Thanks to Leon Karlak for sending me the information about the Kohler. In Leon's own words:

I needed to try and get a new condenser for my Eldorado somewhat quickly so, rather that call Joe Eish, I looked at your recommendations. I couldn't find NAPA's equivalent on their web site or anyone else's. The guy helping me do the job said lets use a Kohler condenser that he happened to have on the shelf. It seems like a great substitute. We took the condenser out of the bracket that came with it and turned it upside down in the bracket. Then we drilled a smaller hole in the bracket closer to the condenser and cut of some of the excess bracket off. Then finished by grinding the sharp edge off of the remaining bracket. This may be helpful for others.

The condenser has a Ø of 18 mm, a Length of 31.5 mm, and a µF of 0.25.